US20040036002A1 - Seismically restrained vibration isolating mounting device - Google Patents
Seismically restrained vibration isolating mounting device Download PDFInfo
- Publication number
- US20040036002A1 US20040036002A1 US10/218,536 US21853602A US2004036002A1 US 20040036002 A1 US20040036002 A1 US 20040036002A1 US 21853602 A US21853602 A US 21853602A US 2004036002 A1 US2004036002 A1 US 2004036002A1
- Authority
- US
- United States
- Prior art keywords
- equipment
- supporting surface
- snubber
- resilient member
- axis
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
- F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/046—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means using combinations of springs of different kinds
Definitions
- the present invention is in the field of seismic isolators. More specifically this invention relates to seismically restraining equipment which must also be vibrationally isolated.
- Seismic capacity is typically limited by the isolator anchorage capacity.
- a seismically restrained vibration isolating mount is desired wherein the seismic restraining contact point is moved closer to the mounting surface thus significantly reducing the tipping loads that can be generated in the restraint housing.
- U.S. Pat. No. 4,356,992 by Donald E. Benkert discloses an earthquake protected vibration isolator where the seismic restraining contact point has been moved closer to the mounting surface to reduce the loads on the anchorage points. However in Benkert the equipment sits on top of the isolator, and so would have to be moved to change the spring.
- a seismically restrained vibration isolating mounting device seismically restrains and vibrationally isolates equipment which is supported by an equipment support means, from the equipment supporting surface.
- This seismically restrained vibration isolating mounting device is comprised of a three-axis snubber mounted to the equipment supporting surface and which restrains the equipment support means; and a vibration isolator, wherein the equipment support means is supported by the vibration isolator and wherein the vibration isolator is supported by the equipment supporting surface, wherein the vibration isolator acts in the direction of gravity, and wherein the three axis-snubber is closer to the equipment supporting surface than the vibration isolator, and the vibration isolator is external to the three-axis snubber.
- FIG. 1 is sectioned side view of a seismically restrained vibration isolating mounting device according to an aspect of the invention.
- FIG. 2 is a sectioned side view of a seismically restrained vibration isolating mounting device according to an aspect of the invention.
- FIG. 3 is a top view of a seismically restrained vibration isolating mounting device according to an aspect of the invention.
- FIG. 4 is a front view of a seismically restrained vibration isolating mounting device according to an aspect of the invention.
- FIG. 5 is a side view of a seismically restrained vibration isolating mounting device according to an aspect of the invention.
- FIG. 6 is a sectioned side view of a seismically restraining support device adaptable for vibration isolation according to an aspect of the invention.
- FIG. 7 is a sectioned side view of a seismic restraint device adaptable for vibration isolation according to an aspect of the invention.
- FIGS. 1 - 6 Various aspects of the invention are presented in FIGS. 1 - 6 which are not drawn to scale and in which like components are numbered alike.
- a seismically restrained vibration isolating mounting device 10 is shown.
- the mounting device 10 seismically restrains and vibrationally isolates equipment 100 , which is supported by an equipment support means 20 , from the equipment supporting surface 200 and comprises a three axis snubber 40 and a vibration isolator 60 .
- the three-axis snubber 40 is mounted to the equipment supporting surface 200 .
- the equipment support means 20 is adapted for attachment to the equipment 100 , and is restrained by the three-axis snubber 40 .
- the vibration isolator 60 is supported by the equipment supporting surface 200 ; and the equipment support means 20 is supported by the vibration isolator 60 .
- the vibration isolator 60 acts in the direction of gravity.
- the three axis-snubber 40 is closer to the equipment supporting surface 200 than the vibration isolator 60 , and the vibration isolator 60 is external to the three-axis snubber 40 .
- FIGS. 3 - 5 show the equipment support means 20 attached to an equipment mounting bracket 110 , and the equipment mounting bracket 110 attached to the equipment 100 .
- This is for illustrative purposes only, as any suitable equipment support means adapted for attachment to the equipment falls within the scope of the invention.
- the vibration isolator 60 comprises a resilient member 64 and an attachment means, wherein the vibration isolator 60 is supported by the equipment supporting surface 200 .
- the attachment means comprises a hanger rod 62 .
- a hanger rod 62 is shown in FIGS. 1 - 5 . This in no way limits the invention to the use of a hanger rod, as any suitable means for attaching the equipment support means 20 to the resilient member 64 is considered to be within the scope of the invention.
- the equipment support means 20 is mounted to the hanger rod 62 such that the equipment support means 20 is between the resilient member 64 and the equipment support surface 200 , and the hanger rod 62 transfers the equipment load from the equipment support means 20 to the resilient member 64 .
- the most commonly used resilient member 64 is a spring, and this is what is shown in FIGS. 1 - 5 ; however any appropriate resilient member may be used, such as, but not limited to, a neoprene element, a fiberglass element, or an air spring.
- the stability of the configuration is greatly increased over configurations with the equipment being supported on top of the resilient member.
- This configuration also allows a designer to specify a restraint element that has a capacity in line with the seismic requirement and independently specify a spring with a capacity in line with the equipment weight. These components can be mixed and matched at will so a high capacity coil with a light restraint unit would work well for low level seismic areas while a small coil with a heavy restraint unit would do the trick for higher level areas.
- the vibration isolator 60 further comprises a load plate 66 and a resilient member support bracket 68 , wherein the resilient member support bracket 68 is mounted to the equipment support surface 200 .
- the load plate 66 transfers the equipment load from the hanger rod 62 to the resilient member 64 , and the resilient member 64 is supported by the resilient member support bracket 68 .
- the resilient member support bracket 68 is a hat shaped bracket having a middle portion 69 , wherein the resilient support bracket 68 is mounted to the equipment supporting surface 200 such that there is a gap 210 between the middle portion 69 of the bracket 68 and the equipment supporting surface 200 , and the three-axis snubber 40 is mounted to the equipment supporting surface 200 in the gap 210 .
- a seismically restraining support device is adaptable for vibration isolation. Certain applications require seismic restraint where the vibration isolating requirements are not immediately known.
- the present invention allows for having a seismic restraint for seismically restraining equipment which is mounted on an equipment supporting surface 200 without the vibration isolator; but configured such that a vibration isolator could easily be added at a later time.
- This adaptable seismic restraint 300 is shown in FIG. 6 and comprises a three-axis snubber 40 , an equipment support means 110 , a support bracket 368 , and a hanging means 362 .
- the equipment support means 110 is adapted for attachment to the equipment, and is restrained by the three-axis snubber 40 .
- the support bracket 368 is a hat shaped bracket having a middle portion 369 , wherein the support bracket 368 is mounted to the equipment supporting surface 200 such that there is a gap 210 between the middle portion 369 of the support bracket 368 and the equipment supporting surface 200 , and the three-axis snubber 40 is mounted to the equipment supporting surface 200 in the gap 210 .
- the equipment support means 110 is attached to the hanging means 362 , and the hanging means 362 is supported by the support bracket 368 . If at a later time vibration isolation is desired, the hanging means can be replaced by a hanger rod/vibration isolator combination as shown in FIGS. 1 - 5 .
- an adaptable seismic restraint 300 is shown in FIG. 7 and comprises a three-axis snubber 40 , an equipment support means 110 , and a support bracket 368 .
- the equipment support means 110 is adapted for attachment to the equipment, and is restrained by the three-axis snubber 40 .
- the support bracket 368 is a hat shaped bracket having a middle portion 369 , wherein the support bracket 368 is mounted to the equipment supporting surface 200 such that there is a gap 210 between the middle portion 369 of the support bracket 368 and the equipment supporting surface 200 , and the three-axis snubber 40 is mounted to the equipment supporting surface 200 in the gap 210 .
- This configuration acts solely as a seismic restraint, and would be used as such on equipment that is mounted to the equipment mounting surface 200 elsewhere, most likely through some type of vibration isolator. If at a later time it was determined that the vibration isolation was inappropriate for the installation, a vibration isolator 60 and hanging means 62 could easily be added (see FIGS. 1 - 5 ).
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
- The present invention is in the field of seismic isolators. More specifically this invention relates to seismically restraining equipment which must also be vibrationally isolated.
- Building codes in many areas require that certain types of equipment be seismically restrained. Newer codes are increasingly requiring equipment mounting to meet a very wide range of seismic forces. In the past, a 1 G rating would work almost anywhere. Now there are applications with requirements as high as 3-4 G's and others with requirements as low as about 0.25 G's. Seismic restraints which can handle the peak loads are overkill for applications having only minimum seismic requirements. A seismically restrained vibration isolating mount is desired wherein the vibration isolator could be sized separately from the seismic restraint such that effectiveness could be maximized while cost is minimized.
- Seismic capacity is typically limited by the isolator anchorage capacity. A seismically restrained vibration isolating mount is desired wherein the seismic restraining contact point is moved closer to the mounting surface thus significantly reducing the tipping loads that can be generated in the restraint housing. U.S. Pat. No. 4,356,992 by Donald E. Benkert discloses an earthquake protected vibration isolator where the seismic restraining contact point has been moved closer to the mounting surface to reduce the loads on the anchorage points. However in Benkert the equipment sits on top of the isolator, and so would have to be moved to change the spring. Also in Benkert, a portion of the snubber covers the spring, and thus the snubber plate would also have to be removed to change the spring. It is desired to have a seismically restrained vibration isolating mount wherein the vibration isolating resilient element is easily accessible, adjustable, and replaceable.
- Further, in Benkert and other known configurations, the equipment is resting on top of the resilient element, which in turn is resting on the mounting surface. A seismically restrained vibration isolating mount with a more stable mounting configuration is desired.
- A seismically restrained vibration isolating mounting device seismically restrains and vibrationally isolates equipment which is supported by an equipment support means, from the equipment supporting surface. This seismically restrained vibration isolating mounting device is comprised of a three-axis snubber mounted to the equipment supporting surface and which restrains the equipment support means; and a vibration isolator, wherein the equipment support means is supported by the vibration isolator and wherein the vibration isolator is supported by the equipment supporting surface, wherein the vibration isolator acts in the direction of gravity, and wherein the three axis-snubber is closer to the equipment supporting surface than the vibration isolator, and the vibration isolator is external to the three-axis snubber.
- FIG. 1 is sectioned side view of a seismically restrained vibration isolating mounting device according to an aspect of the invention.
- FIG. 2 is a sectioned side view of a seismically restrained vibration isolating mounting device according to an aspect of the invention.
- FIG. 3 is a top view of a seismically restrained vibration isolating mounting device according to an aspect of the invention.
- FIG. 4 is a front view of a seismically restrained vibration isolating mounting device according to an aspect of the invention.
- FIG. 5 is a side view of a seismically restrained vibration isolating mounting device according to an aspect of the invention.
- FIG. 6 is a sectioned side view of a seismically restraining support device adaptable for vibration isolation according to an aspect of the invention.
- FIG. 7 is a sectioned side view of a seismic restraint device adaptable for vibration isolation according to an aspect of the invention.
- Various aspects of the invention are presented in FIGS.1-6 which are not drawn to scale and in which like components are numbered alike. Referring now to FIGS. 1-5, according to an aspect of the invention, a seismically restrained vibration
isolating mounting device 10 is shown. Themounting device 10 seismically restrains and vibrationally isolatesequipment 100, which is supported by an equipment support means 20, from theequipment supporting surface 200 and comprises a threeaxis snubber 40 and avibration isolator 60. According to an aspect of the invention, the three-axis snubber 40 is mounted to theequipment supporting surface 200. The equipment support means 20 is adapted for attachment to theequipment 100, and is restrained by the three-axis snubber 40. Thevibration isolator 60 is supported by theequipment supporting surface 200; and the equipment support means 20 is supported by thevibration isolator 60. Thevibration isolator 60 acts in the direction of gravity. The three axis-snubber 40 is closer to theequipment supporting surface 200 than thevibration isolator 60, and thevibration isolator 60 is external to the three-axis snubber 40. - FIGS.3-5 show the equipment support means 20 attached to an
equipment mounting bracket 110, and theequipment mounting bracket 110 attached to theequipment 100. This is for illustrative purposes only, as any suitable equipment support means adapted for attachment to the equipment falls within the scope of the invention. - According to a further aspect of the invention, the
vibration isolator 60 comprises aresilient member 64 and an attachment means, wherein thevibration isolator 60 is supported by theequipment supporting surface 200. In a preferred embodiment, the attachment means comprises ahanger rod 62. Although there are many suitable attachment means, for simplicity only ahanger rod 62 is shown in FIGS. 1-5. This in no way limits the invention to the use of a hanger rod, as any suitable means for attaching the equipment support means 20 to theresilient member 64 is considered to be within the scope of the invention. The equipment support means 20 is mounted to thehanger rod 62 such that the equipment support means 20 is between theresilient member 64 and theequipment support surface 200, and thehanger rod 62 transfers the equipment load from the equipment support means 20 to theresilient member 64. The most commonly usedresilient member 64 is a spring, and this is what is shown in FIGS. 1-5; however any appropriate resilient member may be used, such as, but not limited to, a neoprene element, a fiberglass element, or an air spring. - When the equipment support means20 is mounted to the attachment means between the
resilient member 64 and theequipment support surface 200 as described above, the stability of the configuration is greatly increased over configurations with the equipment being supported on top of the resilient member. This configuration also allows a designer to specify a restraint element that has a capacity in line with the seismic requirement and independently specify a spring with a capacity in line with the equipment weight. These components can be mixed and matched at will so a high capacity coil with a light restraint unit would work well for low level seismic areas while a small coil with a heavy restraint unit would do the trick for higher level areas. - In a preferred embodiment of the invention, the
vibration isolator 60 further comprises aload plate 66 and a resilientmember support bracket 68, wherein the resilientmember support bracket 68 is mounted to theequipment support surface 200. In this embodiment theload plate 66 transfers the equipment load from thehanger rod 62 to theresilient member 64, and theresilient member 64 is supported by the resilientmember support bracket 68. In a further preferred embodiment, the resilientmember support bracket 68 is a hat shaped bracket having amiddle portion 69, wherein theresilient support bracket 68 is mounted to theequipment supporting surface 200 such that there is agap 210 between themiddle portion 69 of thebracket 68 and theequipment supporting surface 200, and the three-axis snubber 40 is mounted to theequipment supporting surface 200 in thegap 210. - According to a further aspect of the invention, a seismically restraining support device is adaptable for vibration isolation. Certain applications require seismic restraint where the vibration isolating requirements are not immediately known. The present invention allows for having a seismic restraint for seismically restraining equipment which is mounted on an
equipment supporting surface 200 without the vibration isolator; but configured such that a vibration isolator could easily be added at a later time. This adaptableseismic restraint 300 is shown in FIG. 6 and comprises a three-axis snubber 40, an equipment support means 110, asupport bracket 368, and ahanging means 362. The equipment support means 110 is adapted for attachment to the equipment, and is restrained by the three-axis snubber 40. Thesupport bracket 368 is a hat shaped bracket having amiddle portion 369, wherein thesupport bracket 368 is mounted to theequipment supporting surface 200 such that there is agap 210 between themiddle portion 369 of thesupport bracket 368 and theequipment supporting surface 200, and the three-axis snubber 40 is mounted to theequipment supporting surface 200 in thegap 210. The equipment support means 110 is attached to thehanging means 362, and the hangingmeans 362 is supported by thesupport bracket 368. If at a later time vibration isolation is desired, the hanging means can be replaced by a hanger rod/vibration isolator combination as shown in FIGS. 1-5. - Some applications already have a means for vibration isolation, but need a means for seismically restraining the equipment. According to a further aspect of the invention, a seismic restraint for seismically restraining equipment which is mounted on an
equipment supporting surface 200 without the vibration isolator; but configured such that a vibration isolator could easily be added at a later time. According to this aspect, an adaptableseismic restraint 300 is shown in FIG. 7 and comprises a three-axis snubber 40, an equipment support means 110, and asupport bracket 368. The equipment support means 110 is adapted for attachment to the equipment, and is restrained by the three-axis snubber 40. Thesupport bracket 368 is a hat shaped bracket having amiddle portion 369, wherein thesupport bracket 368 is mounted to theequipment supporting surface 200 such that there is agap 210 between themiddle portion 369 of thesupport bracket 368 and theequipment supporting surface 200, and the three-axis snubber 40 is mounted to theequipment supporting surface 200 in thegap 210. This configuration acts solely as a seismic restraint, and would be used as such on equipment that is mounted to theequipment mounting surface 200 elsewhere, most likely through some type of vibration isolator. If at a later time it was determined that the vibration isolation was inappropriate for the installation, avibration isolator 60 and hanging means 62 could easily be added (see FIGS. 1-5).
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/218,536 US7028969B2 (en) | 2002-08-14 | 2002-08-14 | Seismically restrained vibration isolating mounting device |
Applications Claiming Priority (1)
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US10/218,536 US7028969B2 (en) | 2002-08-14 | 2002-08-14 | Seismically restrained vibration isolating mounting device |
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US20040036002A1 true US20040036002A1 (en) | 2004-02-26 |
US7028969B2 US7028969B2 (en) | 2006-04-18 |
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US10/218,536 Expired - Lifetime US7028969B2 (en) | 2002-08-14 | 2002-08-14 | Seismically restrained vibration isolating mounting device |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2116740A3 (en) * | 2008-05-07 | 2011-11-30 | Astrium GmbH | Spring damping system |
WO2016098931A1 (en) * | 2014-12-17 | 2016-06-23 | 한밭대학교 산학협력단 | Apparatus and method for measuring presence of organic matter or life/death of living matter |
USD777015S1 (en) * | 2014-10-28 | 2017-01-24 | Acrefine Engineering Services, Ltd. | All-directional seismic (restraint) spring mount with housing |
US9765847B1 (en) * | 2014-04-07 | 2017-09-19 | California Dynamics Corporation | Vibration isolation and seismic restraint apparatus and methods |
US20180194502A1 (en) * | 2017-01-10 | 2018-07-12 | Wistron Corporation | Locking mechanism for locking a floating platform loaded with a machine onto a base, shock absorbing device with locking mechanism, and method thereof |
CN108286584A (en) * | 2018-01-30 | 2018-07-17 | 嘉善卡勒机车零部件有限公司 | A kind of damping part |
USD861465S1 (en) * | 2018-03-08 | 2019-10-01 | Panache Engineering, Inc. | Vibration isolator with seismic mount |
CN110983952A (en) * | 2019-12-26 | 2020-04-10 | 重庆三峡学院 | Wind-resistant damping device and damping suspender suitable for bridge structure |
CN114044075A (en) * | 2021-11-17 | 2022-02-15 | 江苏宗申车业有限公司 | High security passenger tricycle holds battery bracket with |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9316279B2 (en) * | 2013-01-04 | 2016-04-19 | Paul Meisel | Vibration isolator with low elevation seismic restraint |
CN105156536A (en) * | 2015-09-10 | 2015-12-16 | 哈尔滨工业大学 | Aerial photography damping damper |
US9447915B1 (en) | 2016-03-22 | 2016-09-20 | Brent Morgan | Methods and apparatus for seismic mount |
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US3348796A (en) * | 1965-10-23 | 1967-10-24 | Korfund Dynamics Corp | Spherical type of all-directional frictional damper |
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US2209862A (en) * | 1934-10-05 | 1940-07-30 | Rolland S Trott | Engine mounting |
US2117919A (en) * | 1936-04-08 | 1938-05-17 | Gen Motors Corp | Refrigerating apparatus |
US2174216A (en) * | 1937-05-03 | 1939-09-26 | Rosenzweig Siegfried | Vibration dampening apparatus |
US4356992A (en) | 1980-08-29 | 1982-11-02 | Benkert Donald E | Earthquake protected vibration isolator |
US4537382A (en) * | 1982-02-04 | 1985-08-27 | Sperry Corporation | Sway rod suspension system |
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US2439739A (en) * | 1946-05-17 | 1948-04-13 | Hussman Carl | Vibration absorbing mounting |
US3348796A (en) * | 1965-10-23 | 1967-10-24 | Korfund Dynamics Corp | Spherical type of all-directional frictional damper |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2116740A3 (en) * | 2008-05-07 | 2011-11-30 | Astrium GmbH | Spring damping system |
US9765847B1 (en) * | 2014-04-07 | 2017-09-19 | California Dynamics Corporation | Vibration isolation and seismic restraint apparatus and methods |
USD777015S1 (en) * | 2014-10-28 | 2017-01-24 | Acrefine Engineering Services, Ltd. | All-directional seismic (restraint) spring mount with housing |
WO2016098931A1 (en) * | 2014-12-17 | 2016-06-23 | 한밭대학교 산학협력단 | Apparatus and method for measuring presence of organic matter or life/death of living matter |
KR101735464B1 (en) | 2014-12-17 | 2017-05-15 | 한밭대학교 산학협력단 | Device for detecting organic material and measuring death rate of cells, and method thereof |
US10413190B2 (en) | 2014-12-17 | 2019-09-17 | Hanbat National University Industry-Academic Cooperation Foundation | Apparatus and method for measuring presence of organic matter or life/death of living matter |
US20180194502A1 (en) * | 2017-01-10 | 2018-07-12 | Wistron Corporation | Locking mechanism for locking a floating platform loaded with a machine onto a base, shock absorbing device with locking mechanism, and method thereof |
US10472111B2 (en) * | 2017-01-10 | 2019-11-12 | Wistron Corporation | Locking mechanism for locking a floating platform loaded with a machine onto a base, shock absorbing device with locking mechanism, and method thereof |
CN108286584A (en) * | 2018-01-30 | 2018-07-17 | 嘉善卡勒机车零部件有限公司 | A kind of damping part |
USD861465S1 (en) * | 2018-03-08 | 2019-10-01 | Panache Engineering, Inc. | Vibration isolator with seismic mount |
CN110983952A (en) * | 2019-12-26 | 2020-04-10 | 重庆三峡学院 | Wind-resistant damping device and damping suspender suitable for bridge structure |
CN114044075A (en) * | 2021-11-17 | 2022-02-15 | 江苏宗申车业有限公司 | High security passenger tricycle holds battery bracket with |
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